The theory of primary and secondary qualities -- The representational theory of perception and the problem of perception -- Locke's defense of the senses -- Berkeley's case for idealism in Principles I, sections 1-7 -- Direct arguments for idealism in the first dialogue between Hylas and Philonous -- The argument from the ego-centric predicament -- The likeness principle -- Berkeley's attack on the theory of primary and secondary qualities -- Substance/Substratum -- The epistemological argument -- Mind -- God, nature, agency, and causation in perception -- Continuity -- Intersubjectivity